AdWords API Sandboxメンテナンス

Google AdWords APIのオフィシャルブログAdWords API Blogより
Sandbox Maintenance

We will perform our regular refresh of the API Sandbox database on Friday, February 23. As a result, the Sandbox will be unavailable for a few hours.

As a result of this database refresh, all Sandbox user and account data will be erased. Therefore, you will need to first make a request without including a clientEmail header (call getClientAccounts for example) to create your five Sandbox client accounts.

2/23(金)にAPI Sandboxのデータベースをリフレッシュするため、数時間使用できなくなるとの事です。